Radiator cap



., May 22, 1923, 1,456,333

.i M- NELSON RADIATOR CAP Filed April 12, 1922 /5 l l E@ /5 yits Patented May 22, 1923. i

EINER M. NELSON, OF PROVIDENCE, RHODE ISLAND.

RADIATOR CAP.

Appiieation filed Aprii 12, i922. serial No. 551,857.

To all whom t 'may concern:

Be it known that I, EINER M. NELSON, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Radiator Caps, of which the following is a specification. f

This invention relates to a closure device for receptacles, the same being more particularly adapted for use as a closure cap for the filling-opening in automobile radiators, and the object of this invention is to -provide simple and effective means whereby the closure cap may be readily applied and removed without being obliged to screw the same into and out of the threaded neck of the filling-opening.

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is a front elevation showing a portion of a radiator with my improved closure-cap applied to the filling-opening therein.

Figure 2 is a sectional elevation showing the bushin member as permanently screwed into `the'fi lin -neck and the cap as releasably connected to the bushing member by engagement of aiset of pins with the corresponding set offinclined or cam-shaped slots. p

Figure 3 is a sectional elevation of the cap, showing the inwardly-projecting pins on the same.

Figure 4 is a view of the under side of the cap, showing the arrangement of the in! wardly-extending locking pins. Y

- Figure 5 is a side elevation of the bushing member showing a portion as being threaded and another portion as being provided with a set of inclined slots.

Fi ure 6 is a top view of the bushingmem er showing the relative positions of the dierent slots.

Figure 7 is a perspective view of the tension-plate which is located in the head-membei' and pressed downwardly to apply thev be readily applied to and removed from the filling-opening without the necessity of screwing the same into and out of the opening, which operation often requires considerable time and careful manipulation owing to the fact that the threads so often bccome crossed after which the cap is very liable to be lost, but by my improved construction it is only necessary that the cap shall be positioned and turned but a portion of a revolution when it is iirmly and automatically locked in position and the same may be readilyremovedvwlien desired, and thefollowing is a detailed description of one construction by which these results may be accomplished With reference to the drawings, 10 designates an automobile radiator which is provided with the usual filling neck 11 threaded onits inner surface as at 12 for the reception of the old style cap and to take the place of this old style cap, I have provided a bushing member 13 which 'is threaded for a portion of its length as at 14 to be screwed and permanently ixed into the threaded f portion of the radiator neck, the upper portion of this bushing being provided with a plurality of grooves 15 in its face set around at intervals, three being indicated in the drawings. p p

These grooves are arranged to lead from the upper edge of the bushing downwardly on an angle and their inner ends are preferably turned upwardly as at 16 providing retaining notches into which the locking pins 17 of the cap 18' are drawn by means presently described.

The pins 17 in this cap 18 are preferably located as illustrated in Figure 4, to register' with corresponding slots 15 in the bushing so that when the cap is positioned on the outer edge of the bushing the pins will fit in said slots and bya turn of the cap relative tothe bushing a portion of a revolution, these pins will follow down the inclined slots into the notches 16 at their inner ends. v

In order to draw these pins into these upturned notches of the slots to lock the ca against being accidentally turned backward: I have formed an inwardly-extending shoul- 4'der 19 on the inner face of the cap, and I have provided a thin plate 20 which may be. of metal, rubber or other suitable mashoulder 19 so that when expanded againy this plate will engage the shoulder 19 and be prevented by it from dropplngl out.

Before positioning this plate in the cap, I

i first set a spring 23 preferably spirally wound into the head with its upper coil'about the locating pin 2 4, which spring engages the plate when positioned therein to force it downwardly, whereby when the cap is turned into locked positionion its bushing, this plate will be raised from its shoulder 19 to rest against the upper edge of the bushing as shown in Figure 2, and the tension of the spring then working between the plate and the top of the cap, serves to lift its pins 17 into the upturned ends 16 in the bushing.

By this construction it will be seen that the cap is thus releasably secured against being accidentally removed from the bushing without first pressing downwardly on the cap and then Jturning it backward a small portion of a revolution .and in applying the cap it is only necessary to tur'n it in the opposite direction a small portion of a revolution until its pins bring up 'against the inner ends of their slots at which time the spring will automatically'snap these pins intorthe notches to secure the cap in position. The device is extremely simple and practical in its operation and by its use the screwing of the cap into the neck of a radiator is obviated. y

The foregoing description is directed solely towards the construction illustrated, but

I desire it to be understood that I reserve the privilege of resortingto all the mechanical changes towhich the device is susceptible,

the invention being delined and limited onl by the terms of the appended claims. Y

"Iclaimz -1. A closure device for receptacles, comprising a short tubular bushing member threaded for aportion of its length to be screwed into the filling opening 'and also provided with grooves in its face leading from its upper edge downwardly on an angle and notched at their inner ends, and a cap-member fitting over said bushing'and having pins v -threaded for a portion of its length to be screwed into the filling-opening, and also provided with grooves in its face4 leading from 'its upper edge downwardly on an angle and notched at their inner ends, and a l cap-member fitting over said bushing and having an inwardly-eritendingy shoulder, a

thin disk plate retained by said shoulder leo' when the cap is removed, and a spring acting between said plate and cap to press the plate i into engagement with 'said shoulder, said cap also having a set of inwardly-extending pins to t into said grooves in the bushing and follow downwardly therein :by a relative rotation of said cap, said plate then engaging the edge of said bushin to lift the cap-pins into their notches an releasably retain the cap in position.

In testimonyV whereof I ailix my signature.

' EINER M. NELSON. l 

